Improvement in water-heaters for heating buildings



A. MARRIOTT.

. W ate r H e ate rs fo r H e ati n g B u i I d i ng s.

No.150 ,334, PatentedApriI28J874.

ATTEST- lNVENTdR.

UNITED STATES PATENT OFFICE.

AMBROSE MARRIOTT, OF ST. LOUIS,MISSOURL IMPROVEMENT IN WATER-HEATER S FOR HEATING BUILDINGS.

Specification forming, part of Letters Patent No. 150,334, dated April 28,1874; application filed March 7, 1874.

CASE B.

To all whom it may concern:

Be it known that I, AMBROSE MARRIOTT, of St. Louis, St. Louis county, Missouri, have invented a certain Improved Water-Heater for Heating Buildings, of which the following is a specification:

The first part of this invention consists in branching the pipes which connect the top and bottom annular-1y formed casting, as shown and described, so as to offer a greater heating-surface, and at the same time avoid the necessity and inconvenience of a number of joints, which would be necessary if plain pipes were used to efi'ect the same purpose. The second part of my invention consists in forming the lower or bottom casting of one piece, formed with a radial opening or slit, the ends being closed and a space left between, so as to allow for expansion and contraction of the iron caused by the varying temperature to which the iron is exposed, and which, where the casting is made continuous, causes strain and breakage.

The closed ends of the casting are provided with lugs, which rest on the door-arch, or other suitable bracket, and support the movable ends of the casting in their movement caused by the expansion and contraction of the casting.

The grate-bars are formed of horizontal tubes or pipes, connected to suitable transverse pipes at front and rear, which are provided with necks for the reception of said pipes. The back transverse pipe connects to the lower annular casting by a Vertical water leg or pipe.

Figure 1 is a side View of the apparatus, showing the furnace-wall in section. Fig. 2 is a sectional plan, showing half at line X X, and half at line Y Y, and portions being broken away.

A B are the top and bottom annular castings, which are provided with suitable necks a b for the reception of the vertical .pipes 0, whose central part consists of two or more parallel pipes, c c c. a a, &c., b b, &c., are sockets upon the lower side of the casting A, and upper side of that of B, and communicat- B are provided with lugs b I), which rest on a bracket formed on the fire-door arch D, or other suitable bracket built into the furnacewall E. Said door-arch is formed with lugs or studs 61 at each end, to keep the parts in proper relative position, and at the same time allow the movement in the casting caused by expansion and contraction. The grate consists of'the front and rear castings F G, having suitable necks f for the reception of the tubular grate-bar H, the ends of the gratebars being inserted in the said necks f and cemented in place. The front casting connects to the pipe or pipes I, which return the water from the radiators in the building. The rear casting, Gr, connects, by a vertical waterleg, J, with the lower annular casting B. The heater is supported within a suitable brick or iron casing or wall, E, as desired, having a chimney, c, for the escape of the products of combustion. K is a cover, to close the opening of the annular casting A. The outletpipe, which supplies the radiators with water, 1

may be connected to any part of the top casting A. v

The apparatus being filled with water and the fire started, the water is heated in the pipes, and flows upward into the radiators, where it is cooled, and flows back into the ap* paratus through the pipe I, into the hollow grate F G H, thence into the annularcasting B through the vertical leg J, and through the branching pipes O c c 0 into the top annular casting A, to be again supplied to the radiators in a-heated condition.

I claim as my invention 1. The pipe 0, consisting of two or more space between its ends B B and lugs b b, parallel portions or branches, 0 0, connected in combinetion with the fire door arch 1), subby a single neck at top and bottom, by means stantially as set forth.

of the sockets a a and b I), to the Water-cast AMBROSE MARRIOTT. ings A and B, all constructed and combined Witnesses: substantially as set forth. SAML. KNIGHT,

2. The annular cestingB, having an open ROBERT BURNS. 

